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Technology Whitepapers

VirtualLab Fusion enables fast physical-optics system modeling by connecting different solvers instead of applying one universal solver to the entire system.

The numerical accuracy of physical optics simulations is controlled by the numerical parameters of each solver, the sampling accuracy of the fields...

The FMM/RCWA solver consists of an eigenmode solver for each periodically modulated layer and an S-matrix, in the spatial frequency domain (k domain).

VirtualLab Fusion provides fast physical-optics modeling by connecting different field solvers.

The Fresnel matrix solver consists of an eigenmode solver for the homogeneous media on both sides of the interface and matching of the boundary conditions.

In ray tracing for lens systems the rays are originated in the object points and the specific selection is often done with respect to the stop...

We have started to enable the optional decomposition of a master region into subregions in x-domain which form the entrance to subchannels.

The idealized grating function works without any information about the actual shape of the grating structure.

The idealized lens functions works without the knowledge about actual lens surfaces and material.

The layer matrix solver consists of an eigenmode solver for each homogeneous layer and an S-matrix for matching the boundary conditions at all the interfaces.

The LLGA solver assumes local plane wave and local linear grating interactions (x domain), using either the FMM/RCWA or TEA for the grating analysis.

Local Plane Interface Approximation (LPIA) solver work in the spatial domain (x domain) with an approximate local boundary condition.

The RK-BPM solves the electromagnetic field propagation problem in a GRIN medium, by solving two ordinary differential equations simultaneously.

We, the developers of VirtualLab Fusion, do not understand ray and physical optics as two disjunct modeling techniques between which the user must select...

Integrating geometrical optics into multiscale simulation framework necessitates developing a formulation of geometrical optics for electromagnetic fields.

Physical-optics modeling in VirtualLab Fusion is initialized by the light path finder algorithm, which searches for all possible light paths through the system...

One key technique for fast physical-optics modeling with VirtualLab Fusion is the channel concept which enables connecting solvers.

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Use Cases

VirtualLab Fusion provides tools which generate a 3D visualization of optical systems and can therefore be used to check the positioning of elements...

Physical optics enables the access to any kind of light information in the desired image plane.

Different types of wavefront aberrations are selected exemplarily, and the resulting focal spots are investigated for varying strength of the aberrations.

In this use case we demonstrate how the shape of a set of modes generated by either a step- or graded-index fiber.

A solar cell based on copper indium gallium selenide (CIGS) is simulated, and the absorption in the CIGS layer calculated.

This use case shows how to overlay a point cloud (e.g. a dot diagram) onto another result document (e.g. an electromagnetic field result).

Graphics Add-Ons are a tool inside VirtualLab Fusion that allows the overlay of information, such as regions, onto a Data Array.

Coated slanted gratings can be configured easily within VirtualLab. This use case explains the available options for the customization of slanted gratings.

By placing a rotated rectangular aperture behind input fields with different sizes, the PSF and MTF in the focal plane are investigated.

An imaging system consisting of a collimation objective and human eye is modeled, and by changing the illumination conditions, the cases with fully and partially illuminated apertures are investigated.

When a linearly polarized Gaussian beam is focused by a high-NA aspheric lens, the PSF in focal plane shows asymmetry due to vectorial effects.

This use case explains the configuration and usage of the Microlens Array component in VirtualLab Fusion.

Within VirtualLab Fusion, we demonstrate the analyze afocal systems for the generation of laser guide stars, and further optimize the system to control the size of the artificial stars.

We demonstrate how to analyze the polarization-dependent property of binary gratings rigorously, also to optimize the binary structures...

An Offner system that consists of two concentric spherical mirrors is built up and its imaging property is investigated by using the non-sequential field tracing in VirtualLab.

The Fourier modal method (FMM) can be used to analyze grating efficiencies rigorously in VirtualLab Fusion.

Using the rigorous FMM/RCWA, we simulate a CMOS sensor with pixel size equal to or below 2µm, and the influence of diffraction effects at such a small...

We analyze how varying different parameters of the system can affect the position of the focal plane.

For a folded waveguide-based imaging system, the multiple apertures effect, including in- and outcoupling gratings and pupil aperture, is shown to affect the PSF and MTF on image plane.

To evaluate the image quality of a near-to-eye display system, it is important to include the influence from the waveguide structure. In this example, both planar and curved waveguide are investigated.

It is demonstrated that the PSF is distorted due to the aberration caused by off-axis imaging.

It is demonstrated that the PSFs have different shapes when the orientation of the dipole source changes.

Different slanted grating geometries are selected from literature, with varying slant angle, fill factor, and modulation depth, and the diffraction efficiencies are calculated with the Fourier modal method (FMM).

High-NA objective lenses are widely used in optical lithography, microscopy, etc. Consideration of the vectorial nature of light in the simulation of the focusing is of great importance.

We construct an angular-filtering volume grating and apply it in a system to suppress the undesired higher diffraction orders from a beam splitting DOE.

A very typical detector within VirtualLab Fusion is the camera detector which generates a chromatic fields set. This use case demonstrates how easy it is to convert a set of chromatic fields sets into an animation from a parameter run.

In VirtualLab, the variation of parameters in an optical system is freely customizable using the programmable mode of the Parameter Run feature. We use a specific example to illustrate the application of this programmable mode.

VirtualLab Fusion provides a unified free-space propagation concept in the k-domain, together with automatic selection of proper Fourier transform techniques.

We demonstrate how the Parameter Coupling feature of VirtualLab Fusion can be applied in order to automatized positioning of a detector...

This use case demonstrates two examples for a real beam splitter component – one polarizing and one non-polarizing. (optical design setup)

We use a HOE that combines the lens and axicon function to generate Bessel beam from the output of a single-mode fiber.

Have a look at the simulation of birefringence in VirtualLab Fusion and investigates the dependence of the effect on input polarization and crystal thickness.

This use case analyzes the performance a folded imaging system by investigating the polarization state changes throughout the system...

Non-sequential field tracing is done with two steps in VirtualLab Fusion. Firstly, according to an adjustable accuracy factor, the light path through the system is detected. This light path finding can be controlled by the corresponding accuracy factor.

With the flexible channel configuration in VirtualLab Fusion, one can easily control the response of any surface and/or region, to realize the desired model

A hybrid eyepiece with an idealized diffractive lens surface for correcting chromatic aberration is imported from OpticStudio® and analyzed in detail.

By taking a fluorescent microscope as example, we analyze the chromatic effect for the high-NA objective lens, at the emitting wavelength and illumination wavelength, respectively.

Beam apodization plays a key role in the design of high-energy lasers and beam-delivery systems.

It is demonstrated that the fringe contrast in a Michelson interferometer with a light source of certain bandwidth varies when the optical path difference changes.

To speed up your optical design process, the coherence measurement is performed using distributed computing in VirtualLab Fusion.

The Coherence Time and Length Calculator easily determines the coherence time and length for a given source with a specified bandwidth...

High-power laser diodes often exhibit asymmetric divergence and astigmatism. Collimation of such a laser diode is investigated with both ray tracing and field tracing.

We show how to build up a shearing interferometer for the testing of laser beam collimation. By changing the collimation lens system, we observe the change in the interference fringes.

For the task of coupling light into a single-mode fiber, two commercially available lenses are selected, and their performance are evaluated by using the overlap integral.

A Mach-Zehnder interferometer with a coherent laser source is build up in VirtualLab Fusion and analyzed by using the non-sequential Field Tracing.

A complex lightguide system, including a 2D-periodic exit pupil expander in combination with slanted gratings in the outcoupler, is presented. PSF and MTF as well as lateral uniformity are evaluated.

Both Fourier domains (space and spatial frequency) can be used as the domain of implementation for solvers in VirtualLab Fusion. We discuss the implications and analyze the plane surface as a special case.

Compound refractive lenses, which consists of tens or hundreds of individual cylindrical lenses, are used to focus x-ray fields one- and two-dimensionally.

In VirtualLab Fusion, grating structures are configured in a “stack”, which can be constructed with either a sequence of interfaces or special media, depending on the geometry of the grating. In this use case the configuration of grating structures based on interfaces is explained. 

In the VirtualLab’s Grating Software Package grating structures can be configured by using a stack. In this use case the configuration of grating structures based on media is explained.

In VirtualLab Fusion, complex 3D grating structures can be configured using stacks. This use case is focused on the configuration of grating structures which exhibit two-dimensional periodicity.

This use case gives an overview of the different options and tools a user has access to when working with an Optical Setup file.

The conical refraction from a KGd crystal is demonstrated with the fast-physical-optics simulation technology in VirtualLab Fusion.

VirtualLab Fusion allows for the specification of a graded-index lens in a very user-friendly way. In addition, such index-modulated lenses can be analyzed by ray tracing as well as by field tracing.

Light guides with coupling gratings can be set up in VirtualLab Fusion using the Light Guide component and its flexible region definition.

This Use Case shows how to construct a pyramid-like surface by using the programmable surface in VirtualLab Fusion.

The Parameter Coupling feature of VirtualLab Fusion can be used to link the values of different parameters in an optical setup, which allows the user to establish complex relationships between these parameters. ​

In this use case, VirtualLab Fusion’s visualization capability is illustrated. All users with various backgrounds may configure visualization setting on the GUI level.

We demonstrate how to use MATLAB to access the field solvers in VirtualLab Fusion, and use them together with MATLAB functions for analysis and optimization.

We demonstrate how to use Python to run a parameter sweep for a simulation in VirtualLab Fusion.

VirtualLab provides multiple tools to implement your custom sources, components, detectors etc. For documentation of such customized object the snippet help can be used.

VirtualLab Fusion provides a wide array of solutions for diverse applications, offering numerous sources, components, and detectors in the Optical Setup.

We present a customized detector which calculates the grating diffraction efficiencies over a user-defined incident-angle range, and also delivers the mean value and contrast of the efficiencies.

A module in VirtualLab Fusion is generated to calculate the range of the period of a coupling grating, so as to fulfill the guiding condition of lightguides.

The Czerny-Turner setup – a famous historical example of a monochromator – is demonstrated in this use case, including an further application.

A flash LiDAR system, consisting of array of sources, collimation lens system, and diffractive grating, is constructed and its working principle is shown in both the spatial and the spatial frequency domains.

We build up an imaging system, use metal-grid gratings as the test objects, and demonstrate Abbe’s theory on image formation with VirtualLab Fusion.

This Use Cases shows the working principle of a dot projector, including a comparision between an idealized and real design of a diffractive beam splitter.

In this document, we investigate the interference of Yong’s double-slit setup with an extended, partially coherent source, and demonstrated the van Cittert-Zernike theorem.

This use case demonstrates VirtualLab Fusions's capabilities to design and analyze a system with a diffractive beam splitter used to generate a light mark.

This use case demonstrates that VirtualLab Fusion can efficiently be used for the design, optimization, modeling and simulation of a diffractive....

A phase-only transmission function is designed using the iterative Fourier transform algorithm. As an additional step, a phase-only transmission is designed without any phase dislocations.

In this use case, a focusing metalens based on dielectric, cylindrical pillars is designed and analyzed in detail. The parameters used..

We show the import of an intraocular diffractive lens design (Zemax OpticStudio®) into VirtualLab Fusion and optimize the structure for better performance.

The Fourier Modal Method (FMM) is applied for the rigorous evaluation of a non-paraxial diffractive beam splitter.

We design a 2D metagrating for beam splitting. The metagrating is constructed, analyzed, and further optimized in VirtualLab Fusion, especially in terms of the uniformity of the diffraction efficiencies.

With the user-friendly design tools in VirtualLab, a refractive beam shaper for shaping a fundamental Gaussian beam into top-hat profile is designed and analyzed.

The Diffraction Angle Calculator of VirtualLab Fusion is a convenient tool for calculations involving the grating equation...

A physical-optics-based simulation of Czerny-Turner setup, which consists of parabolic mirrors and blazed grating, is presented.

It is demonstrated that the energy densities at the tube lens and at the image plane are influenced by the diffraction of the aperture in the microscopy system.

This use case demonstrates how the diffracted pattern changes when the reflection-type beam splitter (designed for normal incidence) rotates.

With the advanced propagation technology in VirtualLab Fusion, we calculate the diffraction patterns for apertures with different shapes and study the property of diffraction.

We construct a passive parity-time grating and analyze its diffraction property with respect to selected grating parameters and the polarization of light.

This Use Case introduces the Diffractive Lens Component and gives an overview about its options, settings, and computation method.

This Use Case introduces the Microstructure and Diffractive Optical Element (DOE) components and gives an overview over their options and settings.​

This use case introduces the Distortion Analyzer in the optical design software VirtualLab Fusion, illustrated with the example of a spherical lens.

It is demonstrated that the double helix PSF rotates when there is only a small defocus of the object point.

We demonstrate the effect of different mirror coatings on the characteristics of ultrashort pulses like peak value and pulse duration.

With the Electromagnetic Field Detector the user can access the fully vectorial electromagnetic field at any given plane in the system. We explain here how to handle this detector.

With the perfectly matched layers (PMLs) technique, the interaction between a focused Gaussian beam and nanocylinders with varying diameters is investigated.

This use case demonstrates the basic principles of ellipsometry and illustrates the use of the built-in ellipsometry analyzer in VirtualLab Fusion.

This document shows a programmable module that can export any kind of Harmonic Fields Set into ASCII files.

VirtualLab Fusion can export smooth and quantized interfaces, as well as mirror/prism/grating cells arrays into various file formats, e.g., STL and GDSII file format.

VirtualLab Fusion can export smooth surfaces into various file formats, e.g., STL and other customized formats.

VirtualLab Fusion can export quantized HOE structure into various file formats. It is possible to export the files by a pixelized or polygon approach.

In this demo we will show how to export the data of a GCA design via bitmap file format to enable a common data interface to the fabrication technology.

In this document, the export of data from a Parameter Run document is shown. A C# module is used to save the energy density distribution and ...

VirtualLab Fusion supports the export of optical components specified in the system into various CAD formats. This includes for example the export of lenses, prisms, mirror systems and other components into STL and in IGES format.

The propagation of a 5-fs pulse through seawater is studied in VirtualLab Fusion. The broadening of the pulse and the change in its temporal profile due to dispersion of the material are shown.

In this use case, we reproduce the experiments of Zheng et al. [Opt. Express 24 (2016)] to explore the atmospheric turbulence effects on the coupling efficiency between the free-space optical beam and few-mode fibers.

The field curvature describes the difference between the designed focal plane and the actual focal curve of an objective (lens).

This example demonstrate, how to calculate the distribution of the electromagnetic field inside a 1D or 2D-periodic micro- or nano structure.

A Fizeau interferometer is set up with the help of non-sequential field tracing technology, and the interference fringes from several different test surfaces are shown.

This use case walks you through the flexible configuration of regions in VirtualLab Fusion, which allow the user to define variously shapes...

A laser diode with asymmetric divergence and astigmatism is first collimated and then focused. Evolution of the field in the focal region is investigated in detail.

We demonstrate in VirtualLab Fusion the focusing of electromagnetic fields with properly designed apertures.

This use case shows the focusing of an Ince-Gaussian mode through a GRIN medium representing a thermal lens.

It is demonstrated that the focusing of cylindrical vector beams. The vectorial effects of radially and azimuthally beams are demonstrated.

The focusing process of a 10-fs pulse by using a high-NA parabolic mirror is modeled and both the spatial and temporal behaviors are investigated...

It is demonstrated that the focusing of high order Gaussian-Laguerre beam generates donut-shaped PSF. The size of donut-shaped PSF can be adjusted by different high orders.

In this Use Case we demonstrate a propagation of a Plane Wave through a Luneburg lens.

The Footprint and Grating Analysis tool allows the optical designer to determine how the light will interact with the various grating regions of the lightguide.

As one of the most fundamental technologies in VirtualLab Fusion, Fourier transforms connect the space and spatial frequency domains. We discuss the Fourier transforms settings at different examples and show the consequences.

In this demo, we illustrate the Fourier Transforms in an immersion objective system by using stratified media component.

This use cases presents the different options users have in VirtualLab Fusion to configure the selection of Fourier transform algorithms.

The Fresnel Effect Calculator to calculate the Fresnel coefficients directly.

A real beam splitter based on Frustrated Total Internal Reflection (FTIR) is investigated.

This Use Case introduces the functional coatings for optical design, which allow for the generation of idealized coatings...

This use case shows the variation of the focal length of the thermal lens, as well as the focus beam diameter when the input power changes [W. Koechner, Appl. Opt. 9, 2548–2553 (1970)]. This example is published in [H. Zhong, J. Opt. Soc. Am. A 35].

This Tutorial introduces and demonstrates the general tools to manipulate Data Arrays to e.g., perform arithmetic manipulations or change parameters...

We demonstrate the generation of optical beams carrying OAM by using spiral phase plates with different parameters.

With a Mach-Zehnder interferometer setup with two rotatable polarizers, we demonstrate the generation of spatially varying polarization.

Following the idea of T. Wang et al., Appl. Phys. B 122:231 (2016), this use case demonstrates a Sagnac-interferometer scheme to generate vector beam.

Graphics Add-Ons are a tool inside VirtualLab Fusion that allows you to overlay information, such as point clouds.

In this use case, smoothly varied grating parameters are introduced to lightguides for AR/MR applications, by using VirtualLab’s Footprint and Grating Analysis tool. Further, detailed results of the polarization-dependent diffraction efficiencies of the configured grating structures are provided.

This use case introduces the Grating Component in general optical setups, which allows for the inclusion of a wide range of different gratings.

A workflow is presented for how to optimize a grating structure regarding a specified merit function using VirtualLab Fusion and the optimization software optiSLang.

In VirtualLab Fusion, the Grating Order Analyzer can be used for convenient grating diffraction analysis, with results presented in various ways.

We set up a pulse stretcher consisting of two diffractive gratings and investigate the pulse broadening effect induced by the interaction of the pulse with the gratings.

Kirkpatrick-Baez (KB) mirrors focus the grazing-incident X-ray field into a nanometer-scale spot. In this use case the modeling and evaluation of such KB mirror system is demonstrated.  

In this use case we model the propagation of an X-ray field through a Hartmann wavefront sensor composed by an array of pinholes.

A Herrig Schiefspiegler telescope with two mirrors, but with four reflections in a double-pass configuration, is modeled with the non-sequential ray and field tracing techniques in VirtualLab Fusion.

We demonstrates the usage of user-defined merit functions for the evaluation and optimization of order efficiencies of a diffractive high-NA beam splitter.

In high-NA focusing situations, e.g. with parabolic mirror, it is demonstrated that input fields with different polarizations leads to different focal spots.

A two diffractive beam splitter system for high-NA pattern generation is designed with IFTA, and the system performance is investigated, especially with the non-paraxial splitter analyzed by using FMM.

This demonstration shows the capabilities of VirtualLab Fusion to calculate higher resonator modes together with their corresponding Eigenvalues.

A holographic volume grating is analyzed by using the Fourier modal method. Both the spectral and angular properties are presented.

Using laterally shifted modes is one possible strategy to mimic partial spatial coherence. In this tutorial we show you how to manipulate the positions of the source modes via programming.

This Use Case demonstrate how to customize and format a detector result according to personal favor or specific requirements of a report or publication...

This use case demonstrates how to import a previously designed real grating structure into the lightguide component and explains the role and handling of lookup tables.

With the panel-type source in VirtualLab it is possible to model a pixelated display, with the pixel pitch and the number of pixels as free parameters for the user to fix.

The scanning source in VirtualLab Fusion defines a multi-mode source that radiates into several pre-defined directions, which is of help for e.g. the modeling and evaluation of a laser scanning system.

In this tutorial we explain the basics of working with the C# Module: one of the most flexible, most advanced programmable items in VirtualLab Fusion!

The Programmable Component is one of the most versatile programmable elements in VirtualLab. Follow this tutorial for instructions on a first contact with this feature!

In this tutorial we show how to work with the Programmable Detector, one of the most versatile customizable elements in VirtualLab Fusion.

In this document we explain how to work with the Programmable Function, using the example of a cylindrical lens.

In this document we explain how to work with the Programmable Interface, using the example of a simple spherical surface.

In this document we show you how to work with the Programmable Source: a means to define the spatial dependence of a custom basic source mode. We use the Gaussian as an example.

In this detailed tutorial we explain how to create your own custom materials (refractive index with respect to wavelength) in VirtualLab Fusion.

In this detailed tutorial we explain how to create your own custom media (dependence of refractive index on position) in VirtualLab Fusion.

Discover how to create your own custom spectra via programming in VirtualLab Fusion with this in-depth tutorial on the topic, rounded up with a basic hands-on example.

Its flexible detection concept then enables light recombination at the detector, allowing for automatic calculation of radiometric quantities...

A high-NA microscope for imaging of sub-wavelength grating is build up, and the influences from illumination with linear, radial, and azimuthal polarizations is investigated.

Chromatic fields set are standard documents to show a light distribution in VirtualLab Fusion. This use case demonstrates the options for import and export chromatic fields sets.

VirtualLab Fusion can import the beam files from Zemax OpticStudio®, convert it into electromagnetic field information automatically, and support further propagation of the imported field.

This Use Cases demonstrates the import tool for any kind of picture into VirtualLab Fusion.

The import of a bitmap file, which contains height data of a microstructure is demonstrated. This example provides a step-by-step explanation.

In this demonstration we show how to import GRIN-Media which are defined after “Gradient 5”-Shema in Zemax OpticStudio®.

In this use case, we illustrate the workflow of how to import complex material data into VirtualLab Fusion’s materials catalog.

This Demo shows how to use precalculated efficiency to define a grating in VirtualLab Fusion.

VirtualLab Fusion allows the import of optical systems with the full 3D position information and glasses from Zemax OpticStudio®, and provides field tracing for further investigation of the imported system.

This Use Case demonstrates the tool to import 2D, 1D or gridless data arrays from TXT-files into VirtualLab Fusion.

This use case illustrates how to import the measured extraterrestrial sunlight spectrum, and how to subsequently employ said spectrum in an optical system.

Ince-Gaussian Modes constitute an additional solution for the paraxial wave equation. This use case shows how to set up this kind of modes.

In this document we present possible optical design workflows to transfer lens parameter data into VirtualLab Fusion.

It is demonstrated that the positions of the stop in a lens system have influence on the PSF, especially in the case of inclined illumination.

Data Arrays are the most fundamental and flexible native data type in VirtualLab Fusion. This use case is an introduction on how to operate with them.

This use case introduces the Optical Setup, which can be seen as a virtual analogy to the real-life laboratory in VirtualLab Fusion.

VirtualLab Fusion provides three local and one global optimization algorithm. This use case introduces the associated Parametric Optimization document.

The Optimization Package is a dedicated optimization tool designed to complement VirtualLab Fusion as a powerful optical system optimization software...

We investigate diffraction caused by a sample with a rectangular height structure in a Michelson-Interferometer...

A Michelson interferometer is used to analyze a podium sample with different wavelengths.

In this use case we demonstrate the change in the effective focal length caused by thermal lensing on a lens. The deformation of the geometry and the steady-state temperature distribution are calculated using Ansys Mechanical and are then imported into VirtualLab.

The ghost image effect in a collimation lens system is investigated, by checking the reflections between uncoated surfaces.

We use the Debye-Wolf integral calculator in VirtualLab Fusion for vectorial focal field investigation with different parameters.

For a diffractive beam shaper used together with focusing lens, the influence from lens aberrations on the system performance is investigated.

VirtualLab Fusion enables the detailed analysis of grating structures, with possible changes in the polarization state of the diffracted orders taken into consideration.

This use case investigates light behind a microlens array. Effects in the near field, focal plane and far field are shown and discussed.

An optical metrology system with a silica spaced etalon is set up to measure the sodium D lines in the optical design software VirtualLab Fusion.

This use case explains the physical concepts employed in the k-Layout Visualization tool and demonstrates its usage.

A spatial filtering system with a pinhole is modeled in VirtualLab Fusion. We demonstrate how the opening of the pinhole influences the output beam quality.

A Michelson interferometer is set up with the help of non-sequential tracing technology in VirtualLab Fusion, and the interference fringes in different configurations are demonstrated.

In this Demo we modeled the light propagation through lenses with a modulated refractive index.

The Layout Design tool allows to design a custom “Hololens 1”-like augmented or mixed reality system according to the desired specifications.

In VirtualLab Fusion you can export a summary of all system parameters in the light path diagram into an XML File. This use case shows how to export the parameters and how to visualize the parameters.

As one important issue for near-eye display (NED) design, the propagation of light through waveguide structure with tailored in- and outcoupling gratings can be easily modeled with the help of region and channel concept in VirtualLab Fusion.

In this demo a lightguide system is modeled, that uses 2D-periodic grating structures, which is based on the approach from Patent WO2018/178626.

In this use case we model a lightguide system that uses 2D-periodic grating structures (diamond-shaped), according to the approach from Patent WO2018/178626 (by Wave Optics LTD).

This use case shows a lightguide system with a so-called “butterfly pupil expansion”, based on patent US9791703B1 by Microsoft.

Littrow configuration is the chosen denomination for a very commonly used way of orientating a blazed grating in monochromators, spectrometers ...

The Fiber Mode Calculator can be used to calculate linearly polarized (LP) propagation modes in a step-index fiber with a single core or graded-index fiber.

We build up a Mach-Zehnder interferometer in VirtualLab Fusion and demonstrate how the tilt and shift of component affect the interference fringe.

In this demo we will explain the optical setup for uniformity detector with different eye positions.

In this use case we analyze the performance of a diffractive quarter waveplate, designed for a CO2 laser.

Based on selected examples, we show how to construct and configure metagrating structure and materials in VirtualLab Fusion.

It is demonstrated that the contrast of the structured illumination pattern is influenced by the polarization of the incident beam.

With the Mie solution for an electromagnetic plane wave in VirtualLab Fusion, we investigate the scattering effect of spherical particles with different radii and made of different materials.

This use case demonstrates how volume gratings can be modeled and analyzed in the optical design software VirtualLab Fusion.

We demonstrate how such an interferometer can be realized in VirtualLab Fusion...

We design and construct a blazed metagrating in VirtualLab Fusion using square nano pillars, analyze its polarization-dependent diffraction efficiency, and further optimize it.

This use case shows a physical optics simulation of a Herriott Cell for gas spectroscopy, including a demonstration with CO2.

This use case demonstrates the modeling of a device of a simple “HoloLens 1”-type layout with a Light Guide component capable of guiding light with a 32° × 18° FoV.

Such metalenses are sensitive to the polarization of the input field and in this example we demonstrate the polarization behavior.

Metasurfaces allow to imitate a propagation in free space much longer than the actual thickness of the plate...

This document demonstrates how a VCSEL array source can be modeled in VirtualLab Fusion.

An image projection system is set up using the panel-type source. The performance of the system is evaluated by observing the spot grid in both the spatial and angular domains.

We model the generation of Bessel beams with axicon with round tip and investigate how the round tip may influence the Bessel beam evolution.

With the non-sequential field tracing technique, the regarding interference patterns are modeled including vectorial effects.

The Foucault knife-edge test is a well-known historical experiment to determine the characteristics of a given concave-shaped mirror. In this use case we model this test for a spherical and a parabolic mirror.

In VirtualLab Fusion, we perform a fully physical-optics modeling of a Graded-index lens system, which includes the polarization crosstalk effects.

A fast approach for light propagation through a GRIN medium, which includes the polarization crosstalk effect, is implemented, and its validity and advantages are shown in comparison with a rigorous solver.

With the help of typical examples, we explain how to model grating within system and discuss topics like alignment of gratings, grating order selection, and angular response setting.

The imaging properties of microlens array with different lens shapes are investigated. Change of the focal spots with respect to aberration of input field is demonstrated.

This Use Case demonstrates this capability in the context of CO₂ absorption measurement.

In this demo we show that the field distribution is similar as the prediction of ray tracing result (when the sphere enlarged, calculation time of RK

We demonstrate the modeling of the Talbot effect, a well-known near-field diffraction effect from periodic structures such as gratings.

We illustrate the modeling of interference and vignetting effects at a total internal reflection (TIR) prism. Dependent on the characteristics of the impinging light, these effects are introduced by the narrow gap between both prism parts.

This document demonstrates how to achieve the desired intensity distribution of a specific VCSEL source via parametric optimization of two uncorrelated Gaussian modes with the help of the Multiple Light Source.

A hybrid eyepiece with a real diffractive lens surface is imported from Zemax OpticStudio® and analyzed further in VirtualLab Fusion.

A module is programmed to measure the FFT execution time for a quadratic field with different numbers of sampling points, in float and/or double precision.

In this Demo we seek to model the Moiré pattern in an optical setup.

In the field of AR/MR, the accurate calculation of the achievable optical performance is one of the major tasks in optical design.

By using the non-sequential tracing technique in VirtualLab, the ray tracing analysis of a glass plate is performed.

Gouy phase shift, which is a p phase term, can be observed by a Mach-Zehnder interferometer. The interference along optical axis is constructive before focus, while destructive behind focus.

The vital role of diffraction in the Poisson-spot experiment provided proof of the wavelike nature of light.

This document illustrates the generation of vortex-array laser beams using an Ince-Gaussian source.

A complete wafer inspection system including high-NA focusing effect and light interaction with microstructures is modeled, and the formation of image is demonstrated.

This use case introduces the basic configuration of an anisotropic medium.

In this example, we select one commercially available lens and show how to find the optimal working distance to obtain maximum fiber coupling efficiency by using field tracing.

We investigate two strategies of an equidistant gridded moth-eye structure, evaluating their efficancy and outcomes in optimizing AR properties.

Lightguide or waveguide-based systems have proven to be a good approach for many AR/VR applications. To achieve high performance...

We demonstrate the design workflow for optimizing a rectangular grating for one specific incidence direction to obtain maximum efficiency for a specific diffraction order.

This use case demonstrates how to optimize a lightguide with continuously varying fill factor of the gratings in the EPE and outcoupler regions to achieve adequate lateral uniformity in the eyebox.

To ensure uniform multiple waveguide output channels, the outcoupling gratings are optimized, with their efficiencies calculated by the rigorous Fourier modal method.

In this use case we will explain the advanced orientation setting for gratings within a grating region. Currently grating regions are only available within the waveguide toolbox.

The Parameter Variation Analyzer which enables the analysis of the entire system and further process the data obtained.

With the Fourier modal method (FMM) as the kernel on which parametric optimization a slanted grating is designed to achieve high diffraction efficiency.

In VirtualLab Fusion, users can easily construct a two-mirror laser resonator, and use parametric optimization to design this resonator to generate a desired output mode.

With the parametric optimization in VirtualLab Fusion, the design of a fiber coupling lens with conical surface into a single-mode fiber is presented.

This use case introduces the Paraxial Assumptions tool, demonstrating its options and providing a workflow of how to use it.

A scanning system consisting a dual-axis galvanometer and an aspherial focusing lens is modeled, with the rotation of the mirrors taken into simulation as in the practical case.

With the scanning source in VirtualLab Fusion, we analyze the performance of an F-Theta lens, by measuring the focal spot position deviation and the spot size for different scan angles.

The account different powerful computer system it, performance based parameters are introduced and explained.

This document illustrates the usage of the global options for personalization of the view settings of the VirtualLab Fusion.

With the flexible Fourier transform settings in VirtualLab Fusion, we model the diffraction effect from surface apertures and pinholes in a low-Fresnel-number system.

This feature use case demonstrates the capabilities of the Polarization Analyzer for the analysis and optimization of grating structures.

The conversion of polarization of linearly polarized light in a calcite crystal is demonstrated in VirtualLab Fusion.

This Use Case shows how to visualize the polarization state of light, represented as complex electromagnetic wave in a depictive way.

We construct a binary grating with sub-wavelength structure following the principle of form birefringence and demonstrate its polarization-dependent properties.

To model polarizer used in non-paraxial cases, an idealized model is implemented in VirtualLab, and the effect of a polarizer in the focal region is presented.

In VirtualLab Fusion, users can select which information of position and orientation to be shown. This use case shows how to set up the position and orientation information display in a Light Path View.

This use case demonstrate how to configure the position and orientation of optical elements within optical setups.

We demonstrate the Goos-Hänchen shift for a dielectric slab with weak absorption, by measuring the lateral shift of the reflected beam with respect to the incidence angle.

STED Microscopy describes a commonly used technique to achieve super resolution in biological applications.

This Use Case introduces the Speed vs. Accuracy tool which allows the user to customize global sampling parameter.

This use case introduces the Profile Editor in VirtualLab Fusion.

In this programming example, we present some functions which were used in the Classic Field Tracing engine to propagate an electromagnetic field that was represented in an equidistantly sampled form.

This Use Case introduces the Programmable Medium and shows how to customize your own dispersion Formula.

We show how to use a Programmable Grating Analyzer to access the grating diffraction information, to display it, and to use it for further analysisor optimization.

This example shows how to use Programmable Pulse Spectrum to generate a chirped Gaussian pulse, with the pulse specification given in time domain.

Based on the fully vectorial electromagnetic field information, a Programmable Detector is done for the calculation of the degree of coherence.

Based on the full field information, and together with the Programmable Detector, several typically used merit functions in diffractive optics are realized in this example.

This example illustrate the access on field values in a Programmable Detector via source code, and it calculates the sum of all squared amplitudes on the optical axis including all field components.

A Programmable Detector is constructed for saving a light distribution (harmonic fields set) to the desired file path on the hard disk.

In this programming example we illustrate how to code a transmission function that imitates an opaque screen punctured by two round holes.

An example snippet is presented for defining a double slit function, with customizable slit width and distance in between.

This example shows how to realize an array of micro-lenses on a rectangular grid by using the Programmable Interface in VirtualLab.

Gauging the accuracy of a given result is fundamental in science and engineering. In this use case we show you how to program a module to compute the standard deviation between two fields.

This programmable module is designed to be applied to the sharp result of a designed structure, and it will round off the edges according to user-specified values.

In this document you can find an example for the Programmable Function which defines an arbitrary number of equidistant slits with an arbitrary width and distance.

A convex-plano single lens is analyzed by scanning over the radius of curvature and its thickness with the Programmable Parameter Run in VirtualLab Fusion.

In this document you can find an example for the Programmable Interface. Although the sinusoidal surface is provided ready-made in the catalog, we show you how to code it for illustration purposes.

In this example, the generation of sinusoidal volume grating is demonstrated, with the grating period and the refractive index modulation as user-defined parameters.

This document shows a customizable spectral band filter in a system with a Gaussian pulse with a homogeneous spectrum.

A truncated cone structure is generated using the Programmable Interface, with its specifications (height, top/base diameter) as user-defined parameters.

Using the Programmable Interface in VirtualLab Fusion, an anamorphic surface is programmed and especially with the surface gradient analytically given.

In this programming example we illustrate how to use the Programmable Function in VirtualLab to create a custom idealised component that performs like an axicon.

VirtualLab Fusions programmable tools offer maximum flexibility in the definition of physical behavior.

This example shows how to use a customized C# module to execute an IFTA design in VirtualLab Fusion.

See how to create a radially and an azimuthally polarized source, experimenting in the process with the programming of light sources and the potential of the Combined Light Source feature.

We investigate the relationship between the broadening of an ultrashort pulse and the dispersion of given materials that the pulse propagates through.

We investigate the effects of subjecting an ultrashort pulse to propagation through a lens with high numerical aperture, in terms of its spatial, as well as of its temporal, profile.

This Use Case demonstrates the characteristics of an ideal SSTF Setup including the effects of chirp.

This use case demonstrates the modeling a compact reflective microscope system with a very high numerical aperture of 0.99 using VirtualLab Fusion’s fast physical optics technology. Further the result is compared to a reference.

This demonstration simulates a retro reflector with rough surfaces.

We demonstrate how a random rough surface can be modeled and analyzed in the optical design software VirtualLab Fusion.

Following the Rayleigh criterion, we investigate the resolution of three microscope objective lenses with different numerical apertures.

It is demonstrated that the resolution of a microscopy system depends on its numerical aperture.

A physical-optics-based simulation of Czerny-Turner setup consisting of parabolic mirrors and blazed grating for Sodium doublet examination, is investigated.

This Use Case demonstrates a photonic lattice gratings.

This example shows a detector add-on that converts results so that an averaged value is output for each adjustable number of data points.

In this demo we show how to design a diffuser for distinct target pattern for each of the RGB wavelengths. Furthermore, we will generate a Lightguide setup for guiding and separated outcoupling of the RGB modes.

With the Fourier modal method and the parametric optimization in VirtualLab Fusion, we demonstrate the analysis and design of anti-reflective moth-eye structures.

With the rigorous Fourier modal method (FMM), we analyze the effects, especially the phase modulation, of nanopillar structures with varying diameters - the building blocks of metalenses.

We apply the Fourier modal method (FMM / RCWA) within VirtualLab Fusion to analyze resonant waveguide gratings rigorously and demonstrate how to check the resonant effects with focused Gaussian beams.

This use case demonstrates a robustness optimization for a slanted grating that has a slightly varying fill factor.

We demonstrate how to use Python to run an optical simulation in VirtualLab Fusion.

In this Demo we seek to simulate the interference pattern in a Sagnac interferometer setup.

This use case demonstrates the usage of the Savitzky-Golay filter in order to smooth out a measured spectrum.

The scanning mode of the Parameter Run document generates a simulation series of all combinations of specified parameter variations and provides specifically suited output options.

The simulation of a Schmidt-Cassegrain telescope with VirtualLab Fusion. It also investigates the aberration effects in a sample system.

Design of different types of cells arrays, which are used behind white light LED for generating customized patterns, are presented.

The working principle of a Shack-Hartmann sensor is shown using plane waves and spherical waves with different values of the numerical aperture. The sensor itself consists of a double-convex microlens array.

A waveguide combiner is illuminated with a test image that consists of more than 10,000 pixels.

No description available.

This use case demonstrates the application of conical refraction as a tool for polarization metrology.

When a linearly polarized beam is focused by a high-NA lens, the focal spot shows asymmetry due to the relatively strong Ez component.

When SLMs are often employed as programmable diffractive optical elements, the influence from the pixel gaps on the system performance is investigated.

The investigation of the influence of real gratings on the efficiency and uniformity of a lightguide are of essential importance. This use case shows an example with a slanted grating as incoupler and binary surface relief grating as EPE and outcoupler.

In this use case, the relationship between the number of alternate birefringent layers and the Bragg reflection condition is explored with VirtualLab Fusion. The variation of the reflectance efficiency with different wavelengths and incident angles is further investigated.

This document illustrates how to use the Multiple Light Source in VirtualLab Fusion.

This use case shows the modeling a reflective pyramid wavefront sensor by using VirtualLab Fusion’s Field Tracing technology.

Three types of gratings (modeled by phase-only transmissions) are employed in a single grating interferometer for the x-ray...

We model a complete high-NA Fourier microscopy system for single-molecule imaging. Exemplarily, we show the effect of e.g. Fresnel losses at interfaces, diffraction from apertures, and compare the simulation results to a reference.

For optical elements, which cannot be found in the catalogs of VirtualLab Fusion, users are able to create them by using programmable objects, e.g., programmable source, interface, medium and detector. The programming language is C#. The source code editors is the most important structure of all programmable objects. This use case introduces the general structure of the source code editor.

This use case covers the user-friendly interface to select grating orders and specify their efficiencies (either idealized or calculated rigorously) for the grating regions of a light guide.

This Use Case demonstrates a component that facilitates the inclusion and specification of spherical lenses in VirtualLab Fusion.

This use case demonstrates how to model the moth-eye structure by a statistical distribution of cones. For this purpose, the Random Cone Interface is used.

By using an idealized non-paraxial polarizer model, the interaction of a polarizer with incident wave from different angles is investigated, and the results are characterized by Stokes parameters.

This use case introduces the Stratified Media Component and gives an overview of its options, settings, and electromagnetic field solver.

The stress-induced birefringence in a YAG crystal is investigated, by examining the change of output field with respect to the strength of stresses.

We demonstrate, according to T. Clausnitzer et al., how to build up a pulse stretching or compression system with two transmission gratings. Especially, we analyze the polarization dependency of such systems.

In VirtualLab Fusion the user can design phase functions, which works as beam shaper, beam splitter and diffuser. This use case shows the usage of the structure design tool, which can be used to convert the phase function into a height profile.

VirtualLab Fusion enables the user to build up an optical system once and analyze it with different tracing techniques. This use case demonstrates how the non-sequential analysis of your setup can be performed.

In this document, the application and advantages of the System Modeling Analyzer tool are demonstrated at two different examples.

With the region concept in VirtualLab Fusion, apertures with arbitrary shapes can be defined flexibly. Situations with fully and partially illuminated apertures are shown.

A phase mask with a layer of cones is modeled rigorously in VirtualLab Fusion. Different Talbot images are detected, with the pillar pattern reproduced in the primary image plane and the hole pattern in the secondary.

Two commonly used, but very different algorithms for the analysis of diffraction efficiencies of gratings are investigated: TEA and FMM.

It is demonstrated that the PSF is distorted behind the coverslip of an immersion microscope.

VirtualLab Fusion with its idealized lens functions provides an easy way to analyze the focusing effects of polarized vectorial fields...

It is demonstrated that the focal spot is aberrated for tight focusing through a coverslip, which is a stratified medium.

In a fiber coupling optical setup, the coupling efficiency is analyzed with respect to tolerance factors like the shift of fiber end position and the tilt of lens.

In this use case we demonstrate a programmable Parameter Run that allows the user to employ different random distributions for the purpose of tolerancing.

This Use Case presents the different forms of random distributions that could be used to perform a tolerance analysis on a system.

The polarization-dependent properties of ultra-sparse dielectric nanowire grids are analyzed by using the Fourier modal method (FMM, also known as RCWA).

This use case shows how to use the uniformity detector in VirtualLab Fusion.

The Universal Detector is the most versatile tool to evaluate and output any information of an electromagnetic field in VirtualLab Fusion.

It is shown how to model the effect of unpolarized light, as the average of two orthogonal polarization states, for grating simulations in VirtualLab Fusion.

The Camera Detector constitutes one of the most fundamental detectors in VirtualLab Fusion. Keep reading for an in-depth description of how to configure and use this detector in simulations.

The Debye-Wolf integral calculator in VirtualLab Fusion computes the vectorial field near focus based on an idealized model, when the exact specifications of the objective lens are not known.

This Use Case show how Distributed Computing can be activated in VirtualLab Fusion.

The focal length is an important parameter to evaluate an imaging system. By using the Focal Length Analyzer, the effective and back focal length of optical components can be obtained and used with parametric optimization.

Point spread function (PSF) and modulation transfer function (MTF) are important optical quantities to evaluate the quality of an imaging system. In VirtualLab Fusion, PSF and MTF for an imaging system can be calculated fast and accurately.

Using the Parameter Run in VirtualLab Fusion, one can specify the varying range of selected parameters flexibly, so as to perform system analysis.

Due to its high sensitivity to small changes in optical parameters, variable angle spectroscopic ellipsometry (VASE) is a commonly applied technology...

An interferometric setup is built up with SLM, apertures, quarter-wave plates, and grating, in a 4f lens system. Using this setup, we demonstrate the generation of cylindrical vector beams.

In this document we take an in-depth look at the visualization options of 2D Data Arrays and go through the corresponding View ribbon options in detail.

This feature Use Case illustrates the usage of the Global Options parameters that relate to visualization and the graphic display of results.

In this use case we demonstrate a detector add-on for the Universal Detector that superimposes the visualization of lightguide grating regions.

In lens design, the aberration information in the lens system is important for the optimization process. In VirtualLab Fusion, detectors for different kinds of wave aberration representation are provided.

Wavefront error is defined as the difference between the reference wavefront phase, which is a constant phase or spherical phase, and the detected wavefront phase of one optical system. This use case shows how to handle a wavefront error detector in VirtualLab Fusion.

A Michelson interferometer with a Xenon lamp source is modeled with the spectral property, i.e. limited coherence length, of the source fully considered.

We built a confocal scanning microscope in VirtualLab Fusion and used a metallic grating as the test object to demonstrate the working principle of the microscope.

With a low-coherence Xenon lamp source, a Michelson interferometer is built up to demonstrate the working principle of optical coherence tomography (OCT).

In this Use Case we show the Property Browser, which provides a summary of physical and numerical parameters of a selected document.

In VirtualLab Fusion, we reproduce the famous Young’s interference experiment, and checked the influence from slit width, slit distance, as well as the effect of extended source.

VirtualLab Fusion Documentation

This document describes how VirtualLab Fusion is installed and how it can be updated. Questions which might occur during installation are being answered.

No description available.

With this User's Manual you will get a deep introduction and useful details about the fast physical optics design software VirtualLab Fusion.

Webinars

23 November 2021 The new Microlens Array component with its optional lateral channel decomposition technology makes the simulation of MLAs most efficient...

28 May 2017 We will explore the possibilities of solving fiber coupling tasks, and learn about the typical workflows in VirtualLab Fusion.

16 February 2022 The fast physical optics modeling and design software VirtualLab Fusion is perfectly placed to become the simulation tool of choice for optical engineers working in AR and MR...

15 Juni 2021 We will go over the most common workflows in this field of application, so that you can get an impression of the look and feel of the software.

31 August 2021 Listen to our President, Frank Wyrowski talk about the newest applications of our VirtualLab Fusion Software during this EPIC event...

22 September 2022 In VirtualLab Fusion we put at your disposal several tools designed for the user-friendly configuration and simulation of metagratings.

In this webinar we show two scenarios where we demonstrate the design, modeling, and analysis of DOEs, including full system simulation.

13 January 2021 In the webinar we introduce the concept of diffractive lens and generalize it to the usage of digital holographic surfaces. We briefly compare it with the metalens and Fresnel-type lens approaches. The modeling theory of diffractive lenses is discussed and its implementation and usage in VirtualLab Fusion demonstrated.

20 April 2021 In this webinar we simply put some time aside to play around with the physical optics modeling and design software VirtualLab Fusion.

21 March 2023 | Learn how to simulate diffraction gratings and other diffractive optical elements (DOE).

03 February 2021 In this webinar you join us on a journey through the concepts, prospects and myths of the different versions of flat components and lenses.

22 October 2020 The construction of optical systems combining diffraction gratings and lenses and other smooth surfaces is a common occurrence. We have selected three examples to illustrate in the webinar the potential of VirtualLab Fusion in this field.

No description available.

16 February 2022 Augmented and mixed reality (AR & MR) devices constitute one of the most exciting developments in optical engineering in recent times: mainly due to the thrilling new applications they enable, but also, from an optical engineer’s perspective, because of the challenges arising from such systems. The fast physical optics modeling and design software VirtualLab Fusion is perfectly placed to become the simulation tool of choice for optical engineers working in AR and MR. Its consistent vectorial treatment of fields takes complex polarization effects into account, while its “connecting field solvers” technology allows us to combine a rigorous field solver for the grating regions of the lightguide with other, less resource-heavy methods for the free-space propagation and the surfaces of the lightguide, to produce a thorough yet efficient result. Additionally, VirtualLab Fusion offers specific detectors and design algorithms to help the optical designer in his AR & MR design tasks.

27 October 2021 Bayern Photonics and Photonics BW invite you to „Flat Optics and Meta Materials“. Listen to Frank Wyrowski's talk: „Modeling and Design of Flat Optics“...

We will show you how VirtualLab Fusion provides you with specific tools for the configuration and simulation of meta structures.

02 September 2020 VirtualLab Fusion provides a seamless workflow for design and analyzing metagratings.

21 October 2021 Being able to model crystals and anisotropic components accurately is of evident interest across a broad range of fields of application...

30 March 2022 This webinar is hosted and organized by OptoNet – Thuringias Photonic Network. LightTrans is proud to present VirtualLab Fusion.

03 February 2021 VirtualLab Fusion comes with new features for the modeling and design of systems for fiber optics. Based on linearly polarized (LP) modes and Gaussian-Laguerre solver techniques, we present several use cases.

In this webinar we will be giving a rundown of the most prominent features of this latest version...

18 January 2022 President Frank Wyrowski introduces an alternative approach to optical systems modeling in this webinar: identifying and applying the generalization of ray optics inside the framework of physical optics...

17 May 2017 In this webinar, we show how to enable non-sequential tracing in VirtualLab and application use cases, which get large benefits from it.

27 May 2020 In this new webinar series we present the mathematical toolkit that helps make fast physical optics a reality, show how this toolkit is directly reflected in the user interface, and illustrate the impact it has for the average user.

Join our webinar to not only see what VirtualLab Fusion is already capable of in the field of AR/MR, but also to get a sneak peek at upcoming features...

25 August 2021 Many of the features that are introduced in this version help set the stage for a host of new thrilling applications...

02 November 2021 The EPIC Members New Product Release will be a combination of an online meeting with qualified attendees, and a live launch on YouTube for everyone to see...

30 September 2020 In this webinar we will demonstrate the simulation of a series of interferometric setups in the fast physical optics modeling and design software VirtualLab Fusion.

January 2023 Start the New Year right with our new VirtualLab Fusion 2023.1 Release. It will delight you with a fireworks of new features. Stay tuned!

January 2023 Start the New Year right with our new VirtualLab Fusion 2023.1 Release. It will delight you with a fireworks of new features. Stay tuned!

08 July 2020 We are proud to present a new version of VirtualLab Fusion, in which we bring the connecting field solvers technology to the next level. We completely do away with the tendency that exists of only considering diffraction effects at the exit pupil of the system.

January 2023 Start the New Year right with our new VirtualLab Fusion 2023.1 Release. It will delight you with a fireworks of new features. Stay tuned!

 

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info (at) lighttrans.com

 

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